Large thermal conductivity due to spins in the Haldane gap system Y2 BaNiO5

T. Kawamata, Y. Miyajima, N. Takahashi, T. Noji, Y. Koike

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We have measured the thermal conductivity along the a-axis parallel to the one-dimensional (1D) spin chain, κa, of the Haldane gap system Y2 BaNiO5. As a result, we have observed thermal conductivity due to spins, κsp, as large as at least 10 W / K m around 100 K corresponding to the magnitude of the Haldane gap. The large κsp may be due to the large bandwidth of spin excitations. Otherwise, it may be attributed to the ballistic thermal conduction due to spins which is theoretically expected in Haldane gap systems with the spin quantum number S = 1.

Original languageEnglish
Pages (from-to)1212-1214
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Volume310
Issue number2 SUPPL. PART 2
DOIs
Publication statusPublished - 2007 Mar 1

Keywords

  • Haldane gap
  • Low-dimensional spin system
  • Thermal conductivity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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